I have an Edimax Ralink RT73 wireless USB dongle with a driver dated from March 2009 (says its up to date; can't find a newer one).
I have not tried it in compatibility mode so I will give that a shot. I will need to remove the dongle, and completely uninstall the driver, right?
For what it's worth, uninstalling and reinstalling has given me trouble in the past with this. When I install on a new build, I go through the setup and it prompts me when to actually plug the adapter into the computer. However, when this didn't work I uninstalled it and tried reinstalling the driver. It seemed to install correctly, but it never prompted me to plug it in to the computer. It obviously "remembered" something which worries me a little bit.
I will attempt this in compatibility mode when I go home in a few hours though. I assume it needs to be in Windows XP compatibility mode?